Deuteriumexchange of a carboxy group was achieved by photochemical decarboxylation of free carboxylic acids in the presence of thiol and a small amount of D(2)O, and a deuterated product with excellent deuterium content was obtained; this reaction is a practical means of synthesizing regioselective deuterium-labelled compounds under mild reaction conditions.
Dehalogenative Deuteration of Unactivated Alkyl Halides Using D<sub>2</sub>O as the Deuterium Source
作者:Aiyou Xia、Xin Xie、Xiaoping Hu、Wei Xu、Yuanhong Liu
DOI:10.1021/acs.joc.9b02026
日期:2019.11.1
The general dehalogenation of alkyl halides with zinc using D2O or H2O as a deuterium or hydrogen donor has been developed. The method provides an efficient and economic protocol for deuterium-labeled derivatives with a wide substrate scope under mild reaction conditions. Mechanistic studies indicated that a radical process is involved for the formation of organozinc intermediates. The facile hydrolysis